A vital information measuring device includes: a measuring unit for measuring certain vital information concerning a living body; a storage for storing therein a signal outputted from the measuring unit as measurement data; a vital information acquirer for acquiring a sleep apnea index based on the measurement data stored in the storage; a display section for displaying the sleep apnea index acquired by the vital information acquirer; and a device body for integrally mounting the measuring unit, the storage, the vital information acquirer, and the display section.